go for XSLT mapping.
here you have an example of an XSLT used for a similar case of you
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ns0="urn:company.com:smallworld:prefact">
<xsl:template match="stmn_response">
<ns0:MT_ListaRuta>
<RESPUESTA>
<RUTA>
<xsl:value-of select="SALIDARUTA" disable-output-escaping="yes"/>
<RutaId><xsl:value-of select="position()"/></RutaId>
</RUTA>
</RESPUESTA>
</ns0:MT_ListaRuta>
</xsl:template>
</xsl:stylesheet>